安装
- root用户解压，修改配置文件
- 创建新用户es
- 修改文件权限：chown -R es:es /kkb/install/elasticsearch-6.7.0/
- 用es用户启动ElasticSearch和kibana
- kibana启动：nohup bin/kibana >/dev/null 2>&1 &
概念
- Relational DB：Databases -> Tables -> Rows -> Columns
- Elasticsearch：Indices -> Types -> Documents -> Fields
- 索引（Indices）：对应MySQL中的库
- 类型（Types）：对应MySQL中的表
- 文档（Documents）：对应MySQL中的行
- 字段（Fields）：对应MySQL中的列
- 映射（mapping）：定义数据类型
- 分片（shards）：将索引划分为多份，可以存放在任何节点上（每个索引默认5个）
- 复制（replicas）：分片的拷贝，防止数据丢失（每个索引默认1个）
操作
- curl ：在命令行下面访问url的工具，可以简单实现常见的get/post请求。centos默认库里面是有curl工具，如果没有可通过yum安装
- -X 指定http的请求方法 有HEAD GET POST PUT DELETE
- -d 指定要传输的数据
- -H 指定http请求头信息
- restful：在kibana中操作
- java api
命令
- curl
curl -XPUT http://node01:9200/blog01/?pretty
curl -XPUT http://node01:9200/blog01/article/1?pretty -d ‘{"id": "1", "title": "What is lucene"}‘
curl -XGET http://node01:9200/blog01/article/1?prettycurl -XPUT http://node01:9200/blog01/article/1?pretty -d ‘{"id": "1", "title": " What is elasticsearch"}‘
curl -XGET "http://node01:9200/blog01/article/_search?q=title:elasticsearch"
curl -XDELETE "http://node01:9200/blog01/article/1?pretty"
curl -XDELETE http://node01:9200/blog01?pretty
- 增加数据（批量）
POST /school/student/_bulk
{ "index": { "_id": 1 }}
{ "name" : "liubei", "age" : 20 , "sex": "boy", "birth": "1996-01-02" , "about": "i like diaocan he girl" }
{ "index": { "_id": 2 }}
{ "name" : "guanyu", "age" : 21 , "sex": "boy", "birth": "1995-01-02" , "about": "i like diaocan" }
- 查询（全部）
GET /school/student/_search?pretty
{
"query": {
"match_all": {}
}
}
- 查询（关键字）
GET /school/student/_search?pretty
{
"query": {
"match": {"about": "travel"}
}
}
- mapping定义字段类型
DELETE school
PUT school
{
"mappings": {
"logs" : {
"properties": {"messages" : {"type": "text"}}
}
}
}
POST /school/_mapping/logs
{
"properties": {"number" : {"type": "text"}}
}
GET /school/_mapping/logs
- 管理分片和副本数
DELETE document
PUT document
{
"mappings": {
"article" : {
"properties":
{
"title" : {"type": "text"} ,
"author" : {"type": "text"} ,
"titleScore" : {"type": "double"}
}
}
}
}
GET /document/_settings
PUT /document/_settings
{
"number_of_replicas": 2
}
分片数初始定义后无法修改
参考
安装
https://cloud.tencent.com/developer/article/1595027
root用户无法启动
https://www.cnblogs.com/tree1123/p/13152267.html
hive数据存入ES
http://www.bubuko.com/infodetail-3047662.html
elasticsearch-head安装
https://www.chajianmi.com/topic/ffmkiejjmecolpfloofpjologoblkegm#download
https://blog.csdn.net/boss_way/article/details/105826584
基本操作
https://www.cnblogs.com/leohahah/p/10310214.html
分片异常
https://www.cnblogs.com/carryLess/p/9452000.html
kibana
https://blog.csdn.net/baidu_24545901/article/details/79031291